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Finding the Fourth Proportional to 386,677.98, 579,878.55 and 133,890.58

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Solution

The fourth proportional to 386,677.98, 579,878.55 and 133,890.58 is: 200,787.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,677.98 : 579,878.55 = 133,890.58 : x
  2. Step 2: Convert to fraction form
    386,677.98/579,878.55 = 133,890.58/x
  3. Step 3: Cross multiply
    386,677.98x = 579,878.55 × 133,890.58
  4. Step 4: Simplify right side
    386,677.98x = 77,640,276,113.91
  5. Step 5: Solve for x
    x = 77,640,276,113.91/386,677.98
  6. Step 6: Final answer
    x = 200,787.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.